May 1999
T
NT
DUC
PRO LACEME 747
7
ETE
P
SOL DED RE 800-442-
B
O
EN
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s 1-
OMM lication harris.c
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CA3126
TV Chroma Processor
[ /Title
(CA31
26)
/Sub-
ject
(TV
Chrom
a Pro-
cessor)
/Autho
r ()
/Key-
words
(Har-
ris
Semi-
con-
ductor,
TV
chroma
pro-
cessor,
subcar-
rier
regen-
era-
tion,
ntsc,
acc,
over-
load
detec-
tor,
keyed
chroma
out-
put,
color
proces-
sor,
indus-
trial
Features
• Phase Locked Subcarrier Regeneration Utilizes
Sample-and-Hold Techniques
• Automatic Chrominance Control (ACC)/Killer Detector
Employs Sample-and-Hold Techniques
• Supplementary ACC with an Overload Detector to
Prevent Oversaturation of this Picture Tube
• Sinusoidal Subcarrier Output
• Keyed Chroma Output
• Emitter Follower Buffered Outputs for Low Output
Impedance
• Linear DC Saturation Control
Description
The Harris CA3126 is a monolithic silicon integrated circuit
designed for TV chroma processing and is ideally suited for
NTSC color graphic applications that require subcarrier
regeneration of the color burst signal.
Part Number Information
PART NUMBER
CA3126E
CA3126M1
TEMP.
RANGE (
o
C)
-40 to 85
-40 to 85
PACKAGE
16 Ld PDIP
20 Ld SOIC
PKG.
NO.
E16.3
M20.3
Applications
• TV/CATV Receiver Circuits
• NTSC Color Decoder/Processor
• Computer Graphics Subcarrier Regenerator
• Timing Reference for Frame Grabbers
• DSP Clock Timing Reference Source
Pinouts
CA3126
(PDIP)
TOP VIEW
CA3126
(SOIC)
TOP VIEW
CHROMA IN
AFPC FILTER +
AFPC FILTER -
RF BYPASS
GROUND
VCO OUT
VCO IN
CARRIER OUT
1
2
3
4
5
6
7
8
16 CHROMA GAIN CONT.
15 CHROMA OUT
14 ZENER REF
13 OVERLOAD DET.
CHROMA IN
AFPC FILTER +
NC
AFPC FILTER -
RF BYPASS
1
2
3
4
5
6
7
8
9
20 CHROMA GAIN CONT.
19 CHROMA OUT
18
17
16
15
14
13
12
NC
ZENER REF
OVERLOAD DET.
V+
ACC +
ACC -
HORIZ. KEY IN
12 V+
GROUND
11 ACC+
VCO OUT
10 ACC-
9
HORIZ. KEY IN
VCO IN
NC
NC 10
11 CARRIER OUT
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
©
Harris Corporation 1999
File Number
860.5
8-33
HARRIS [ HARRIS CORPORATION ]
